Adjustable interrupter cam



w. E. SCHWARZMANN.

ADJUSTABLE INTERRUPTER CAM.

APPLICATION FILED JAN. 11; 1921.

Patehted Aug. 22, 1922.

5 4 3 l H Q 41 m 1 6,1 6 52 1k u A l. 5

5] wveMbz Wolfgarry f. jrhwarzmm -ED siren-1's" PATEN oF icE'.

WOLFGANG n. scHwAnzMANN, oE- LoNGMnADow, iviassacnnsnrrs, Kssmnon T AMERICAN Boson Mnennro coraronarromfio'rsrnmerrnrn,'rmssaennsn'rrs, a I

CORPORATION on NEW YORK,

ADJUSTABLE INTERRUPTER T 0 (ZZZ 'w ham it may concern SCl-UVAR ZJIA'NN, a citizen of the United States, residing ate]; Belleclaire Avenue, Longmeadow, in the countyjof Hani pden,

State of Massachusetts,f'have inventedcen taiii new and useful Improvements in Ad-' and exact description of theinvention, such as will, enableothersskilled in the artto" tothat having a timing ring'carrying' interter cams and a timing arm. h he adjustable member of ,the,1nterrupter is ordinarily in the form-of a ring carrying j cams which are'periodically engaged by the defiectable elemento'f a pair 'otrotating con- W f y ng, elements, These cams have fixedrelatiojn in theadjustable member or :1111 ring by the V manufacturer the interrupteiz, When installing, and testing the timing relation it frequently occurs that p the position of the-cams with relationto the ring is not they best to suit the particular engine installation, or in the course of operation it may be found that'the ends of the cams have become worn so that the interrupter contacts are slightly late in separating the interrupter contacts and breaking the primary circuit of the ignition system.

WVith the above in view, it is an object of my invention to adjust the interrupter cams with angular relation to the cam ring, and, therefore, in accordance withone part of my invention, the cam ring and the cams have adjustable means, preferably in the form of slots in the cam ring and securing means passing through and adjustable along ,theslots, for securing the cams in adjusted 5 position, so that the impacting of the cams may be advanced or retarded to the position which will effect a correctly timed operation of the deflectable element of the contact carrying elements of the interrupter mechanism,-the connecting means having means tocontinually cover the apertures so as to xclude access of foreign matter to the cams nd entry thereof into the interrupter echanism,

ustable interrupterCamsj and do hereby declare the following tobea full, clear,

heretofore been positioned and fastened. in

.J Specificati oncf LettersfPa-renaf]. 'm t g 22,1922; Applicationfiled .fannary. 11, 192}, "s rial No.j436,62 5i and a shoe; respectively engages with the Aisdanotherpart of my inventiona cam inner andouter surfaces of the cam ring 1 and a,i"e co.nnected by a connecting means extending through and movable along an elongatedaperture provided in the cam ring between the camand sh oe so that relative adjustment between the cam and the" cam ring jislobtainedythe vshoe also constantly covering the'ape-rture so" as to exclude access of foreign matter-to the cams and entry v thereof into the interrupter'mechanism, and I the connecting means being operable, after ad ustment of, the cam is made, to rigidly f secure thecam in adjusted position.

In'the accompanying drawing illustrating thepreferred embodiment of the invention;

l is- ,an end View of the timing ring andt1m1ng arm with; the adjustable cams in position; Fig. 2 is aside viewther'e 03mg, 3 a top plan View thereof; Fig; 4

tie a view similar to Fig. 3showin g the elongateduperture through which theconnectmgboltpasses; Fig. 5 is a fragmentary'secytional view taken on line 5-5 of Fig. 3;

and Fig, 6 is a fragmentary sectional'view taken on line 6 6 of Fig. 3. I r

l erring more rtic'ularly to the draw- 111g, in accordance with my invention comprises a cam ring 1 to which is secured a timing arm 2.by suitable securing means 3, such as screws or rivets. The cam ring has an annular peripheral groove or recess 4 and a pair of elongated apertures 5 piercing through the cam ring in the bottom of the recess 4. On each side of each aperture 5 is located a cam 6 and a'shoe 7 connected together by a screw bolt 8 passing through the aperture, the cam 6 having a curved surface 9 corresponding to the inner surface of the cam ring and in engagement therewith, and the shoe 7 having a curved surface 10 corresponding to the curvature an adjustable timing device constructed annular groove or recess I so as to prevent theturningot the shoe 7 during the adjustl. The outer end of the bolt :8receives a nut 13 between which, and the shoe 7, is

interposed a Washer 14 of"any.suitab1e material.

When-- it is desired to adjust the position of the cam or cams 6 angularly yvith respect to the cam ring 1 the nut 13 may belodsene tl and each cam 6 together with the bolt 8, shoe7, 'Washer'M'an'd nut l31are moved so as to slide th'e carn 6 along the inner surface of the ring 1 and the shoe 7 along the annular recess or" groove 4 to' the extent desired'la nd then .the nut 13' is tightened 'Whe'rebythe'cani 6 and the shoe 7 are caused to bind against'the inner surface of the cam ring an'd*tlie bottom 01 the groove 4;;

respe'ctively, and thus maintain the same rigidlyin adjustedposition.

Theshoe 7 is also ofsu'ch. a size as to completely' cover the aperture 5 at any adjusted position thereof so as to uprevent access offoreignmatt'er to the cam 6 and the entry thereof into the interrupter mecha nism. The side alls 12 ofthe'annular re cess 'or meve 4 are continually in engage ment with the lateral edges 11. of the shoe 7 during the adjusting movement of the latter] whereby the sh'oe 7 is prevented'froin turn-' ing about the; axisot thefbolt 8; thus maintainingth'ecurved surface 1.0 of the shoe in proper-relation with thecurved bottom of the recess 4.

Having thus described my invention what I claimis i 1. In a timing mechanism for magnetos, the coinbinationofa cam ring, an interrupter cam, said ring having an elongated aperture, and securing means passing through mentot the cam 6 relative to the ;cam ring :lthe combination of a cam ring having a timing arm secured thereto, interrupter cams, said ring having elongated apertures, and securing means passing through and adjustable along said" apertures :for securing said cams in adjusted position.

3. In a timing mechanism for magnetos, the combi nation'of a cam ring having a timing'arm secured thereto, interrupter cams, said ring having elongated apertures, and. securing means passing through and adjustable along said apertures for securing said cams in' adjusted positioln said means having means forclosing' said apertures at all times for excluding foreign matter from said cams. t

t. In a timingmechanism for magnetos, the combination of a cam ring having a timing arm secured thereto an interrupter cam' in engagement with the inner surface of said ring, a shoe in engagement with the outer surface of said ring, said ring having an face of said ring, said connecting means operable to rlg dly secure said cam in adj usted position.

In testimony whereof I affix my signature.

VQIJIiGrANG E. SGHWARZMANN. 

